Radian Circle

What is the measure of the angle shown, in radians?

• π/2

• 3π/4

• 2π/5

• 3π/5

The length of an arc is 18cm and the radius of the circle is 6cm. What is the radian measure of the central angle?

• 3 radian

• 2 radian

• 4 radian

• 2π radian

Find the arc length.

• 3π/4 ft

• 39π/4 ft

• 13π/4 ft

• 4π/13 ft

What is the approximate length of the arc subtended by an angle of 4π/3 radians on a circle with a radius of 6.00 meters?

• 12.57 meters

• 14.14 meters

• 25.13 meters

• 28.27 meters

Move the angles in radians to their correct location on the unit circle

e

f

g

h

d

c

b

a

Mark each Radian Measure in its correct spot

e

f

g

h

d

c

b

a

0

How many radians in a full circle?

• π/2

• π

• 3π/2

• 2π